Piston sealing ring for ultrahigh-pressure oil-free air cylinder

Abstract

The utility model is suitable for the technical field of piston sealing rings, and provides a piston sealing ring for an ultrahigh-pressure oil-free air cylinder. A support skeleton; the mounting groove is formed in the side face of the supporting framework; the movable sealing wheel is movably arranged in the mounting groove; the supporting ring frame is movably connected to the middle of the movable sealing wheel in an inserted mode. Compared with the prior art, the sealing device has the advantages that when the piston moves up and down, the movable sealing wheel movably installed on the surface of the piston can make rolling contact with the surface of the inner wall of the air cylinder, and therefore the situation that abrasion is too fast due to excessive hard friction between the movable sealing wheel and the inner wall in the traditional sealing process is avoided; and the movable sealing wheel and the supporting framework are separately arranged, so that only the movable sealing wheel needs to be replaced during replacement, and the replacement cost is reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of piston sealing rings, and particularly relates to a piston sealing ring for an ultra-high pressure oil-free cylinder. Background Art

[0002] An oil-free cylinder, also known as a pneumatic oil-free cylinder, refers to a cylinder that does not require oil mist lubrication and uses air instead of lubrication.

[0003] When an oil-free cylinder is working, the piston moves in the cylinder body by controlling the air pressure. At the same time, for sealing to reduce gas leakage and friction, multiple O-ring seals and piston rings are installed on the surface of the cylinder piston. The piston sealing rings in the prior art are generally composed of single stamping parts and are mostly made of metal materials, resulting in poor resilience. After long-term use, due to frequent friction and work, metal fatigue will occur in metal parts, and then wear will occur. As a result, the sealing ring will have a slight deformation phenomenon, resulting in air leakage. Therefore, when performing ultra-high pressure work, the power will weaken, affecting normal use, and ultimately leading to the need to replace the entire sealing ring, increasing the cost during replacement.

[0004] Therefore, how to provide a piston sealing ring for an ultra-high pressure oil-free cylinder is an urgent problem to be solved by those skilled in the art. Summary of the Utility Model

[0005] The purpose of the utility model is to provide a piston sealing ring for an ultra-high pressure oil-free cylinder, aiming to solve the problems mentioned in the background art.

[0006] The piston sealing ring for an ultra-high pressure oil-free cylinder of the utility model includes:

[0007] A support skeleton;

[0008] An installation groove, which is opened on the side of the support skeleton;

[0009] A movable sealing wheel, which is movably arranged inside the installation groove;

[0010] A support ring frame, which is movably inserted into the middle of the movable sealing wheel.

[0011] Preferably, an upper groove is opened on the outer side of the upper end of the support skeleton, and a lower groove is opened on the outer side of the lower end of the support skeleton.

[0012] Preferably, an inclined thread is arranged on the inner side of the support skeleton to facilitate rotation during work.

[0013] Preferably, Z-shaped openings are provided on the surfaces of the support skeleton, the support ring frame, and the movable sealing wheel to avoid the influence of thermal expansion and contraction, and they are arranged in a staggered manner during installation.

[0014] Preferably, graphite coatings are sprayed on the surfaces of the support skeleton and the movable sealing wheel for self-lubrication.

[0015] Compared with the prior art, the beneficial effects of the present utility model are as follows: when the piston moves up and down, the movable sealing wheel movably installed on its surface will rollingly contact the surface of the inner wall of the cylinder, thus avoiding the excessive hard friction with the inner wall during traditional sealing, which may lead to the situation of too fast wear. And since the movable sealing wheel and the support skeleton are separately arranged, when replacing, only the movable sealing wheel needs to be replaced, thereby reducing the replacement cost.

[0016] Meanwhile, when moving up and down, the upper groove and the lower groove will tilt and open outward under the action of the air pressure in the corresponding moving direction, thereby further improving the sealing performance, and will squeeze the surface of the movable sealing wheel, making it fit more closely with the inner wall of the cylinder, thus further improving the sealing performance of the piston. Description of the Drawings

[0017] The drawings are used to provide a further understanding of the present utility model and constitute a part of the specification. Together with the embodiments of the present utility model, they are used to explain the present utility model and do not constitute a limitation to the present utility model. In the drawings:

[0018] Figure 1 is a schematic top view of the piston seal ring for a super-high pressure oil-free cylinder provided by an embodiment of the present utility model;

[0019] Figure 2 is a schematic bottom view of the piston seal ring for a super-high pressure oil-free cylinder provided by an embodiment of the present utility model;

[0020] Figure 3 is an enlarged schematic main sectional view of the piston seal ring for a super-high pressure oil-free cylinder provided by an embodiment of the present utility model;

[0021] Figure 4 is an enlarged schematic top sectional view of the piston seal ring for a super-high pressure oil-free cylinder provided by an embodiment of the present utility model;

[0022] Figure 5 is provided by an embodiment of the present utility model Figure 3 of the enlarged schematic structure of part A.

[0023] In the figure: 1 - support skeleton, 2 - upper groove, 3 - lower groove, 4 - support ring frame, 5 - movable sealing wheel, 6 - inclined thread, 7 - installation groove. Detailed implementation mode

[0024] In order to make the purpose, technical solution and advantages of the present utility model clearer, the following further details the present utility model in combination with the attached drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model.

[0025] The following describes the specific implementation of the present utility model in detail in combination with specific embodiments.

[0026] As shown in Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 , the structural schematic diagram of the piston sealing ring for ultra-high pressure oil-free cylinder provided by an embodiment of the present utility model includes;

[0027] Supporting skeleton 1;

[0028] Installation groove 7, and the installation groove 7 is opened on the side of the supporting skeleton 1;

[0029] Movable sealing wheel 5, and the movable sealing wheel 5 is movably arranged inside the installation groove 7;

[0030] Supporting ring frame 4, and the supporting ring frame 4 is movably inserted in the middle of the movable sealing wheel 5.

[0031] In the embodiment of the present utility model, when the piston moves up and down, the movably installed movable sealing wheel 5 on its surface will roll and contact the surface of the inner wall of the cylinder, thereby avoiding the excessive hard friction with the inner wall during traditional sealing, resulting in too fast wear.

[0032] As shown in Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 , as a preferred embodiment of the present utility model, an upper groove 2 is opened on the outer side of the upper end of the supporting skeleton 1, and a lower groove 3 is opened on the outer side of the lower end of the supporting skeleton 1.

[0033] In the embodiment of the present utility model, when in use, the upper groove 2 and the lower groove 3 will tilt and open outwards under the action of the air pressure in the corresponding moving direction, so that the sealing performance is further improved, and the surface of the movable sealing wheel 5 will be extruded, making it fit more closely with the inner wall of the cylinder, thereby further improving the sealing performance of the piston.

[0034] As shown in Figure 1 , Figure 2 , Figure 3 and Figure 5As shown, as a preferred embodiment of the present utility model, an inclined thread 6 is provided inside the support skeleton 1, which facilitates rotation during operation.

[0035] In the embodiment of the present utility model, when the piston is used up and down, the support skeleton 1 will rotate under the drive of the inclined thread 6 inside, so that the rotation process of the movable sealing wheel 5 is smoother.

[0036] As Figure 1 、 Figure 2 and Figure 4 As shown, as a preferred embodiment of the present utility model, Z-shaped openings are provided on the surfaces of the support skeleton 1, the support ring frame 4 and the movable sealing wheel 5 to avoid the influence of thermal expansion and contraction, and they are arranged in a staggered manner during installation.

[0037] In the embodiment of the present utility model, when in use, the support skeleton 1, the support ring frame 4 and the movable sealing wheel 5 are all installed through the Z-shaped openings. At the same time, due to the setting of the Z-shaped openings, it is avoided that when thermal expansion and contraction occur, the support skeleton 1, the support ring frame 4 and the movable sealing wheel 5 can still maintain a close state.

[0038] As Figure 1 and Figure 2 As shown, as a preferred embodiment of the present utility model, graphite coatings are sprayed on the surfaces of the support skeleton 1 and the movable sealing wheel 5 for self-lubrication.

[0039] In the embodiment of the present utility model, when in use, a graphite lubricating film will be formed between the support skeleton 1 and the movable sealing wheel 5 and the inside of the cylinder under the action of the graphite coating, thereby further reducing the friction generated when contacting with them.

[0040] In the above embodiment of the present utility model, a piston sealing ring for an ultra-high pressure oil-free cylinder is provided. When in use, first install the support skeleton 1 in a groove preset on the surface of the piston so that the inclined thread 6 inside it is in contact with it;

[0041] Subsequently, the movable sealing wheel 5 with the support ring frame 4 is pressed into the installation groove 7 preset on the side of the support skeleton 1 so that most of it enters therein, and only a part close to the edge is exposed;

[0042] Thus, when the piston moves up and down, the movable sealing wheel 5 movably installed on its surface will rollingly contact the surface of the inner wall of the cylinder, thereby avoiding the situation of excessive hard friction with the inner wall during traditional sealing, resulting in too fast wear;

[0043] Meanwhile, when moving up and down, the upper groove 2 and the lower groove 3 will tilt and open outward under the action of the air pressure in the corresponding moving direction, thereby further improving the sealing performance. Moreover, the surface of the movable sealing wheel 5 will be extruded, making it fit more closely to the inner wall of the cylinder, thus further improving the sealing performance of the piston.

[0044] The above are only the preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. The piston sealing ring for ultra-high pressure oil-free cylinder is characterized in that, Include; Support framework; Installation groove, which is opened on the side of the support framework; Movable sealing wheel, which is movably arranged inside the installation groove; Support ring frame, which is movably inserted in the middle of the movable sealing wheel.

2. The piston sealing ring for an extra-high pressure oil-free cylinder according to claim 1, wherein An upper groove is opened on the outer side of the upper end of the support framework, and a lower groove is opened on the outer side of the lower end of the support framework.

3. The piston sealing ring for an ultra-high pressure oil-free cylinder according to claim 1, wherein, The inner side of the support framework is provided with inclined threads to facilitate rotation during operation.

4. The piston seal ring for a super high-pressure oil-free cylinder according to claim 1, wherein Z-shaped openings are provided on the surfaces of the support framework, support ring frame and movable sealing wheel to avoid the influence of thermal expansion and contraction, and they are arranged in a staggered manner during installation.

5. The piston sealing ring for a super-high pressure oil-free cylinder according to claim 4, characterized in that, Graphite coatings are sprayed on the surfaces of the support framework and movable sealing wheel for self-lubrication.

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